[Bug-readline] [PATCH] configure.ac, readline.pc.in: fix Requires.private value

[Thomas Petazzoni]

The provided readline.pc.in hardcodes the fact that readline depends
on the tinfo library. However, different termcap implementation are
supported beyond tinfo. This commit improves the configure.ac script
to define a TERMCAP_PKG_CONFIG_LIB variable, which is then used in
readline.pc.in.

This for example allows the generated readline.pc to properly contain
"Requires.private: ncurses" when ncurses is used as the termcap
implementation.

Signed-off-by: Thomas Petazzoni <address@hidden>
---
 configure.ac   | 8 ++++++++
 readline.pc.in | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index fd0cec4..9f85f37 100644
--- a/configure.ac
+++ b/configure.ac
@@ -276,6 +276,13 @@ case "$BUILD_DIR" in
 *)     ;;
 esac
 
+case "$TERMCAP_LIB" in
+-ltinfo)  TERMCAP_PKG_CONFIG_LIB=tinfo ;;
+-lcurses) TERMCAP_PKG_CONFIG_LIB=ncurses ;;
+-lncurses) TERMCAP_PKG_CONFIG_LIB=ncurses ;;
+-ltermcap) TERMCAP_PKG_CONFIG_LIB=termcap ;;
+esac
+
 AC_SUBST(BUILD_DIR)
 
 AC_SUBST(CFLAGS)
@@ -292,6 +299,7 @@ AC_SUBST(host_os)
 AC_SUBST(LIBVERSION)
 
 AC_SUBST(TERMCAP_LIB)
+AC_SUBST(TERMCAP_PKG_CONFIG_LIB)
 
 AC_OUTPUT([Makefile doc/Makefile examples/Makefile shlib/Makefile readline.pc],
 [
diff --git a/readline.pc.in b/readline.pc.in
index fbfca8a..a7f2cf3 100644
--- a/readline.pc.in
+++ b/readline.pc.in
@@ -7,6 +7,6 @@ Name: Readline
 Description: Gnu Readline library for command line editing
 URL: http://tiswww.cwru.edu/php/chet/readline/rltop.html
 Version: @LIBVERSION@
-Requires.private: tinfo
+Requires.private: @TERMCAP_PKG_CONFIG_LIB@
 Libs: -L${libdir} -lreadline
 Cflags: -I${includedir}/readline
-- 
2.14.3